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B16.5 CLASS 150 300 600 900 SOCKET WELD FLANGE RF
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B16.5 CLASS 150 300 600 900 SOCKET WELD FLANGE RF
B16.5 CLASS 150 300 600 900 SOCKET WELD FLANGE RF, SWRF FLANGE, ASTM A105, SCH40, SCH80, STD
